Refraction of light- Yr 10- 19/4/2020

Light travels at a speed of 300,000 km/s in outer space but can slow in different materials like glass or water.

• True

• False

This image is an example of …………..

• Reflection phenomenon

• Diffusion phenomenon

• Refraction phenomenon

Refraction is when light__________.

• Is bounced by an object or material.

• Changes speed as it travels in different materials which causes bending.

• When light speeds up to over 300,000 km/s

Light emerging from water to air will bend ______ due to the change of speed as it crosses the boundary.

• toward the normal

• away from the normal

• along the normal

A refracted wave has the same wavelength as an incident wave.

• true

• false

The speed of light in vacuum is 3x10⁸m/s. its speed in ruby of index of refraction 1.54 is …….

• 1.95 x 10⁸m/s

• 5.1 x 10^-9m/s

• 4.62 x 10⁸m/s

The speed of light in vacuum is 3x10⁸m/s and the speed of light in diamond is 1.24x10⁸m/s. the index of refraction in diamond is ……….

• 2.42

• 0.42

• 1

For light to pass from medium (1) of index n₁ to medium (2) of index n₂ where n₂ < n₁, the angle of incidence must be ……………… than the refracted angle.

• greater

• smaller

• equal